What was the purpose of the League of Nations?

The League of Nations was established after World War I with the primary purpose of promoting international cooperation and preventing future conflicts. The idea behind its creation was to provide a forum where countries could resolve their disputes peacefully, rather than resorting to war. This goal stemmed from the recognition of the destructive consequences of the Great War and the desire to foster a more stable and cooperative international environment.

The League aimed to achieve disarmament, settle international disputes through negotiation and diplomacy, and improve global welfare by addressing issues like health and labor standards. Although it did not have the authority or military power to enforce its decisions, its foundational principle was based on collective security, which essentially sought to deter aggression through the promise of mutual defense amongst member nations.

While the other options mention important global issues, none encapsulate the League's main function as effectively as the promotion of international cooperation and the prevention of conflict. Establishing a military alliance or being solely focused on humanitarian aid or trade regulations diverges from the League's intended role and objectives.